Talking machine with record changer



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L. THEVENAZ TALKING MACHINE WITH RECORD CHANGER June 20, 1950 isShee'ts-Sheet 1a Filed March 3, 1947 L22) emi L. YYZGLWZL Z PatentedJune 20, 1950 TALKING'JMACHINE WITH RECORD CHAN GER .Louis Thvenaz, LesRasses,'near Sainte Croix,

Switzerland, assignor to Hermann Thorens Societe Anonyme, a Swiss firm.

Application March 3, 1947,. Serial No. 732,001 1 In Switzerland March13, 1946 12"(3laims. .11

Thi invention relates to talkin machines with record-changer adapted toplay automatically and successively the underside of thelowermostrecordof astack supported on afirst supporting surface and theupper side of .the same record after it has been brought withoutreversal onto a second supporting surface positioned in verticalalignment withthe first supporting surface.

Animportant feature of the invention resides iiithe .provision of asingle tonearm, at the extremity ofwhich, a pick-up with singleoscillating device. is pivotally mounted; and. of means controlled. bythe cycle control device of the recordchanger for-turning saidopick-upover by 180 in order to automatically bring the single stylus intoeither of the playing positions.

"Other. features and objects of the invention will appear hereinafter.

In the accompanying drawings in which are shown two practicalembodiments of the invention:

"Fig.1 is an elevational view with parts in section of a first talkingmachine with recordchanger embodyin theinvention, without casing and'withoutde'vice controlling'the rotation of the pick-up with respect tothe tone arm.

"Fig. 2 is an'enlarged broken view partly in section and partlyinelevation of the central shafts of the machine.

Figs. 3, 4 and 5 are broken and enlarged axial sectional views of therecord supporting shaft of the machine in three difierent workingpositions.

Figf 6 is a cross-sectionalview taken on line VI-'VIoi Fig. 3. v

"Fig. 7 is an elevation'al'view with parts in section of the mechanismcontrolling the movements of the tone arm.

Fig. 8 is a general plan View ofthe mechanism controlling 'the'movementsof the pick-up and the record feeding "Fig. 9 a vertical sectional Viewtaken onthe broken line IX-AIX of Fig. 8.

Fig. 10 is a plan view of the mechanismpo'si- L tioning the tone arm forplaying different sized records.

-Figs. ll. and "12 are partial elev'ational views of the mechanismpositioning the tone arm for playingdifferent sized records in twodifferent working positions.

' Fig. 13 is an'eievational view of the cam controlling the movements ofthe tone arm.

Fig; 14 is a diagrammatic view illustrating the action ofthe cam'shownin Fig. 13.

Fig. 15--isa detailed perspective'view illustrating the construction'oi'the cam showrrin Fig. 13.

Fig. 16 is a partial elevational view on enlarged scale; with partsinsection of the mecha- "nisni'for turning the pick-upover.

Fig. 17 is a partial plan'view with parts in section of the samemechanism.

Fig. 18 is a side elevational view of'the' same mechanism taken on theline 'xvnr xvm or 'Fig.16.

Fig. l9'is a top plan view of a second talking machine embodying theinvention, 'the casing-being partly broken away toshowthepick-up inplaying position at the beginning of a 30 cm. record.

Fig. 20' is a'general elevational View of this Fig. 20, with a partofthe mechanism controlling the lateralmovements of the tone armrepresentedtherein.

Fig. 23 is a partialvertical sectional viewon enlarged scale takenonlineXXIII-XXIII "of Fig. 19,showing the" tone arm in playing position'at thebeginning ofthe upper side of a 30 cm. recordsupported'onthe turntableand further'showin the pick-up in different positions. 'Figf24-is abackview of a part of the mcha- :nism.

Fig. 251s an elevational view with partsin section taken on linXXV-'-XXV6f Fig. 19, showing apart of the device for'lifting the tone arm.

"Fig." 26 is an 'elevational 'view with parts in Fig. 28 is anehlarged"elevational View with parts in section'of a detail of themechanism shown in'Fig. 26. I

"Figf-"29 is a similar'view of the same"detail in another position.

. 'Fig. 30 is a' sectional "View taken on"line XXX -XXX of Fig. 26; and

"Figi'31 is'- a-topplan view of the'device controlling the turningofthepick-up.

The firsttalking machine representediifFigsi 1' to 18 comprises a firstelectric motor I fixed to the underside of the base plate 2 by means ofthree bolts 3; the driving shaft 4 of this first motor rotates theturntable 5 on which is supported a 30 cm. record 8 the upper side ofwhich is to be played by the pick-up I through the medium of its singlestylus 8. The upper end of the driving shaft 4 is formed with a socket 9within which is lodged a ball thrust bearing 31 rotatably supporting thesemi-spherical lower end Ill of a straight shaft II extending verticallythrough the central aperture of a stack of records I2, the lowermost oneI2 of which is supported on the supporting surface I3 formed by theupper edge of a U-shaped piece 34 (see Figs. 2 to 6) hingedly connectedto the shaft II, within a longitudinal groove thereof.

The semi-spherical upper end 38 of the shaft I I is engaged in a bushingI 4 formed at the lower end of the downwardly extending driving shaft I5of .a second electric moto I6 positioned above the stack of records I2on a bracket II secured to;the. base plate 2 by means of feet i8 screwedthereto. On the stacked records I2 rests a presser plate Ill looselyengaging the shaft I I and adapted toprevent the records fromoscillating during their rotation. The upper motor I6 rotates inopposite direction to the lower motor I thus rotating the shaft II,which is coupled with the driving shaft I5, and with shaft I I thestacked records I2 in the opposite direction to the record 6 supportedon the turntable 5.

Record feeding mechanism As shown in Figures 2 to 6, the removable shaftI I which rotates the stacked records I2 in opposite direction totherecord 6 supported on the The supporting surface I3 is formed by theupper edge of the U-shaped piece 34 which is hinged about a pin 35diametrically crossing the hollow shaft II. The piece 34 is placed underthe action of a spring 36 which tends to maintain it in the positionshown inthe Figures 3 and 4 with the supporting surface I3 emerging fromthe shaft II. The supporting surface I3 is thus collapsible into theinside of the hollow shaft II under the action of one or more recordsdisplaced upwardly as shown by the arrow in Fig. 5. It is thus possibletorestore at will one or more records from the turntable up to thesupporting surface I3, which means to reload the changer withoutremoving the shaft II and without waiting for all of the stacked recordsturntable 5 is hollow and within said shaft is slidingly mounted aplunger 26 placed under the action of a coil spring 21 which tends tourge it upwards. At the lower end of the plunger 26 is-secured a link 28having a longitudinal slot 29 and a cross-pin 3!). With the link 28 ishingedly connected a push-lever 3I pivoted at its upper end about across-pin 32 engaging the slot 29 of the link 28 and secured to theshaft II; the push-lever is provided at its median portion with a biasedslot 3Ib in' which engages the pin 30 of the link 28 and is formed witha nose 3Ib. The push-lever 3I is thus hingedly connected with the link28 in the fashion of a scissors blade so that, a downward displacementof the plunger 26 against the action of the spring 2'! causes the noseturntable 5, when, under the action of the record 7 feeding device whichwill hereinafter be described the plunger 26 is disp1aced downwards.Meanwhile the upper edge of the nose 3Ia holds the last record but oneI2 and the whole stack while the edge of the central aperture of therecord I2 opposite to that which has been pushed by the nose 3 I aenters a notch 33 provided in the wall of the hollow shaft I I so thatsaid record I2 gets clear of the supporting surface I3 and drops ontothe turntable 5. Fig. 3 shows the position of the record releasingmembers of the shaft II during the-playing of a record, and Fig. 6 showsthe same members in releasing position of the record I2 ning against theshoulder formed by the upper edge of this notch.

The shaft I I is rotatably supported by its lower .semi-spherical endII) on the ball thrust bearing 25 3? within the socket 9 and engaged byits semispherical upper end 38 in the bushing I4 formed at the lowerextremity of the driving shaft I5 of the upper motor I6. The drivingshaft I5 rotates at 78 revolutions per minute, like the driving shaft 4of the lower motor I, but in the opposite direction. It is driven bymeans of a worm gear 39, made of antisound material, meshing with a worm40 formed at the extremity of the rotorshaft of the motor IS. The upperportion of theshaft II is provided with a longitudinal groove- 4I inwhich engages a blade 42 riveted to a semicircular spring 43 lodged inan annular grooveof the bushing M. The removable shaft II is. thusdriven by the blade 42 which is dependent upon the bushing I4, thelatter being rigid with the driving shaft I5. The presser plate rotates.together with the shaft II. The lower end of the longitudinal groove 4|serves to hold the presser plate I9 when all of the stacked records havebeen released from the supporting surface I3. s

The upper driving shaft I5 is axially bored and in its bore is slidablymounted a rod 44 the upper end of which emerges from the shaft I5 and isformed with a head 45 on which acts a bell crank lever 46 being part ofthe record feeding control mechanism which will hereinafter bedescribed.

When it is desired to reload the changer, the shaft l I carrying thepresser plate I9 is removed by lifting it vertically until its lowersemi-spherical end ID is released from the socket 9 of the lower drivingshaft 4, then inclining and lowering it to disengage its uppersemi-spherical end 38 from the bushing I4. The different sized recordsto be played are then stacked in any desired order onto the turntable 5with their central bore engaging the upper end of the shaft 4. The shaftII carrying the presser plate I9 is then restored to its axial positionbetween the socket 9 and the bushing I4 and the whole stack of recordsis lifted manually along the shaft II causing the supporting surface I3to collapse as shown in Fig. 5 against the action of the spring 36 whichrestores it after the passage of the lowermost record to its supportingposition.

If, when. the upper semi-spherical end 38 of the shaft I I is introducedinto the bushing I4, the coupling blade 42 does not lie in front of thegroove M, the spring 43 will yield up and permit introduction of theshaft, which then needs only'

